Degradation Analysis of Long-Term Solid Oxide Fuel Cell Stacks with Respect to Chromium Poisoning in La<sub>0.58</sub>Sr<sub>0.4</sub>Co<sub>0.2</sub>Fe<sub>0.8</sub>O<sub>3−δ </sub> and La<sub>0.6</sub>Sr<sub>0.4</sub>CoO<sub>3−δ </sub> Cathodes
نویسندگان
چکیده
Chromium poisoning as a result of Cr evaporation from the metallic components and subsequent deposition on cathode (i.e., air) side is one most critical degradation mechanisms in solid oxide fuel cell (SOFC) stacks. Recently, LSC La0.6Sr0.4CoO3−δ) exhibited more promising results both electrolysis modes than LSCF La0.58Sr0.4Co0.2Fe0.8O3−δ) due to its higher ionic conductivity, despite relatively high thermal expansion coefficient (TEC). Furthermore, it has been reported that oxygen surface exchange kinetics Sr stability/activity may imply resistance against comparison LSCF. For these reasons, long−term stack operation with cathodes was performed for two different designs. The behavior stacks respect analyzed support electrochemical impedance spectroscopy post-mortem analysis.
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ژورنال
عنوان ژورنال: Journal of The Electrochemical Society
سال: 2021
ISSN: ['0013-4651', '1945-7111']
DOI: https://doi.org/10.1149/1945-7111/ac2c11